Okla. Stat. tit. 47, § 47-12-404: Windshields and windows - Obstruction, obscuring, or

impairing of driver's view - Electric windshield wiper mechanism.

A. As used in this section:

1. "Critical area" means the area cleaned by the normal sweep

of the windshield wiper blade on the driver's side. The area

covered by the wiper blade cannot be reduced from manufacturer's

original specifications;

2. "Noncritical areas" means all other areas;

3. "Outright breakage" means glass which is severely cracked or

shattered to the extent that air passes through it or, if by running

a fingertip over the cracked area, the glass moves or sharp edges

can be felt;

4. "Star break or shot damage" means a vented break with cracks

radiating from the point of impact; and

5. "Stress or hairline crack" means a crack which has no

visible point of impact.

B. No person shall operate any motor vehicle which:

1. Is not equipped with a windshield;

2. Has any outright breakage in the windshield or in the window

on either side of the driver;

3. Has any star break or shot damage, three (3) inches or more

in diameter, located in the critical area; or

4. Has two or more stress or hairline cracks, twelve (12)

inches or more in combined length, located in the critical area.

C. No person shall drive any motor vehicle with any sign,

poster, other nontransparent material, or debris, including but not

limited to snow, ice, or frost, upon the front windshield or the

side wings, or side or rear windows or suspend any sign, poster,

object, or other material from the interior of the vehicle which

materially obstructs, obscures, or impairs the driver's clear view

of the highway ahead or to either side or of any intersecting

highway.

D. The windshield on every motor vehicle shall be equipped with

an electric windshield wiper mechanism for cleaning rain, snow, or

other moisture from the windshield.

Every windshield wiper blade and windshield wiper mechanism upon

a motor vehicle shall be maintained in good working order. When

replacing the wiper blade, the length of the blade shall not be

reduced from the manufacturer's specification.